Passage-door lock.



H. G. VOIGHT & N. B. HURD.

PASSAGE DOOR LOOK.

APPLICATION FILED 001*. 26, 1911.

O Patented June 4,1912.

2 SHEETS-SHEET 1.

A A i v H. G. VOIGHT & N. B. HURD.

PASSAGE DOOR LOOK.

APPLICATION nun 0071.26, 1911.

Patentd June 4, 1912.

2 SHEETS-SHEET 2.

arm: trio HENRY G. VOIGHT AND NORMAN B. HURT), OF NEVJ BRITAIN, CONNECTICUT, ASSIGN- OBS TO THE AMERICAN HARDWARE CORPORATION, OF NEW BRITAIN, CONNECTI- OUT, A CORPORATION OF CONNECTICUT.

PASSAGE-DOOR LOCK.

To all whom it may concern:

Be it known that we, HENRY G. VoIcHr and NORMAN B. HURD, citizens of the United States, residing at New Britain, county of Hartford, State of Connecticut, have invented certain new and useful Improvements in Passage-Door Locks, of which the following is a full, clear, and exact description.

Our invention relates to looks and is particularly concerned with a lock especially adapted for a passage or communicating door between connecting hotel rooms.

The object of the invention is to provide a lock which may be operated by the same series of keys as are used to operate the lock of the corridor of the apartment. The particular series of keys here referred to com prises a guest key, a maids key for opening all doors on one floor, the housekeepers key for opening all doors on all floors, a guard key, usually kept in the oiiice of the hotel, by which a room may be locked off against the holders of the guest, maids and housekeepers keys, and an emergency key, usually retained in the hands of the proprietor, which may look off an apartment against all of the other keys of the series, including the guard key, and which may unlock a door when locked by any of the other keys.

The passage door lock embodying this invention may be locked or unlocked by the guest, maids or housekeepers keys interchangeably, but when locked by the guard key, the door cannot be unlocked by the three keys mentioned. Similarly when locked by the emergency key, the door cannot be unlocked by the three keys mentioned, although the door may be locked and unlocked interchangeably by the guard and emergency keys, thus differing in this respect from the corridor lock.

With these objects in view, the invention consists in the construction and arrangement of parts, the preferred embodiment of which is illustrated in the accompanying drawings, in which, V

Figure 1 is a side elevation of the lock with the cover plate removed for showing the interior mechanism. Fig. 2 is a view similar to Fig. 1 showing the position of the tumbler when the dead bolt has been projected either by the guard or emergency keys. Fig. 3 is a sectional view on the line Specification of Letters Patent.

Application filed October 26, 1911.

Patented June a, 1912.

Serial No. 656,842.

3 8, Fig. 1 looking to the left. Fig. 1 is a slde elevation of one of the tumbler bars connecting the two sets of tumblers of the dead bolt.- Fig. 5 is a similar view of the companion tumbler bar. Fig. 6 comprises plan and edge views of a tumbler bar lever, employed with one of the sets of tumblers. Fig. 7 is a plan view of another tumbler lever. Figs. 8, 9, 10, 11 and 12 are fragmentary views showing the bitting of the guest, maids housekeepers guard and emergency keys, respectively.

In the embodiment of our invention herein selected for illustration, 1 is a lock case,

2 is a face plate, 3 is a dead bolt, 4; is a latch bolt ordinarily employed in a lock of this kind. The dead bolt is provided with two sets of tumblers, the first, or upper set, including among others, an emergency tumbler 5, (Fig. 2) having a tongue 6 which operates with the racking stump 7 on the dead bolt, as hereinafter described.

8 and 9 are tumbler bars which serve as connections between the tumblers of the upper set and the tumbler of the lower set, the lower set of tumblers including a tumbler lever 10 having a projection 11, extending into vertical notches 12 and 13 of the tumbler bars 8 and 9 respectively.

The cover plate upon the outer side of the lock is provided with a duplex or double ended keyhole 14:, (Fig. 3) opposite the upper end of which is a key post 15. The back plate of the lock is also provided with an inverted keyhole 16 opposite the first mentioned keyhole. Likewise this back plate, or opposite side of the lock, is provided with a second keyhole 17, opposite which is a key post 18. The guest, guard and emergency keys are of the drill pin type, whereas the maids and housekeepers keys are of the solid pin type. The drill pin keys may be inserted in the keyhole 14 in normal position taking over the post 15, and in this position are adapted to operate directly the upper set of'tumblers. These three keys are also adapted to be inserted in the keyhole 17 taking over the key post 18, and operate directly upon the lower edges of the lower set of tumblers. The maids and housekeepers keys may be inserted in inverted position either in the keyhole 14: or the keyhole 16 and operate on the upper edges of the lower set of tumblers.

The guest key is so bitted that when inserted in the keyhole 14: and operated directly upon the upper set of tumblers, it raises the emergency tumbler 5 when projecting the dead bolt, causing the racking stump 7 to pass beneath the emergency tongue 6 of said tumbler. The guard and emergency keys, however, are so bitted that when they are likewise inserted in the keyhole 14: to operate directly upon the upper set of tumblers, they do not raise the emergency tumbler, thereby permitting the racking stump 7 to pass above the emergency tongue 6 as indicated in Fig. 2. In such position of the emergency tumbler with the dead bolt projected, the guest key cannot retract the dead bolt for the reason that it cannot raise the emergency tumbler.

When either the inaids or housekeepers key is inserted in inverted position in the keyhole 14, they depress certain tumblers of the lower set, such as 19. These tumblers are pivoted upon the post 20, and each is provided with a slot such as 21, Fig. 1, having lost motion relatively to a post 22 projecting from the back plate of the lock, upon which post the tumbler bar operating lever 10 is pivoted. This tumbler 10 has a pin 23 which projects through slots at in the tumblers, such as 19, so that when the tumblers 19 are depressed by the maids or housekeepers key so inserted in inverted position in the keyhole 14, these tumblers 19 acting on the pin 23 tilt the tumbler bar operating lever 10 so that its projection 11 acting on the tumbler bar 9 causes said tumbler bar to move l0ngitudi nally and thereby through its shoulder 9 Fig. 5, to operate the gated tumblers of the upper set so as to permit free forward movement of the racking stump 7 when the dead bolt is projected. The bar 9 also raises the emergency tumbler 5, thus enabling the guest, maids and housekeepers keys to operate interchangeably. The particular arrangement of gating of the tumblers of the upper set is immaterial, provided it is such that the racking stump is released under the conditions described. It may be noted in passing, that the so-called tumblers of the lower set are not in a strict sense tumblers, since they are not provided with gates cooperating with the racking stump. They are in fact, tumbler levers serving to operate either directly or indirectly upon the tumbler bars 8 and 9 to in turn operate the tumblers of the upper set but as they,

spection of the slot 13 in said tumbler bar. In the tumbler bar 8, however, the notch 12 is provided with a horizontal extension 12, Fig. 5, within which the projection 11 may move without actuating said tumbler bar 8. In the tumbler bar 9, however, the notch 13 has no horizontal extension, hence, this tumbler bar is always operated when the tumbler bar lever 10 is operated.

The lower set of tumblers, include also a lever 25, Figs. 1 and 7 pivoted at 20 and having a projection 26, which extends into notches 27 and 28 of the tumbler bars 8 and 9 respectively.

The notch 28 in bar 9 has a forward extension 28, so that when this tumbler lever 25 is operated, its projection 26 will not operate the bar 9, but invariably operates the bar 8. The upper end of the bar 8 is provided with a slot 29, which lies opposite the emergency tumbler 5 of the upper set, consequently this bar will not operate the emergency tumbler when the lower set of tumblers is operated.

The guest key is so bitted that when it is inserted in the inner keyhole 17, it operates the tumbler lever 10 directly, and consequently through the tumbler bar 9, raises the emergency tumbler 5 in projecting the dead bolt. The guard and emergency keys, however, are so bitted that they do not operate the tumbler lever 10 when inserted in the keyhole 17 and consequently do not, under these circumstances, operate or raise the emergency tumbler 5, hence, when the door is locked from this side by the guard or emergency keys, it cannot be unlocked from either side by the guest, maids or housekeepers key, owing to the fact that each of these last three keys must raise the emergency tumbler when operated. Thus the same set of keys adapted to the corridor lock of the apartment is also adapted to so operate the passage or communicating door lock that the latter may be locked and unlocked interchangeably by the guest, maids and housekeepers keys, and may be locked or unlocked interchangeably by the guard or emergency keys, which at the same time prevent operation of the guest, maids and housekeepers keys, so that adjoining rooms may be thrown into communication or locked against unauthorized communication by the guest, maids and housckeepers keys, and may be locked off each from the other so that they cannot be thrown into communication by any persons except those holding the guard or emergency keys.

While we have herein described a particular embodiment of our invention, the same may be altered in detail and relative arrangement of parts, within the scope of the appended claims.

What We claim is 1. In a lock, the combination with a dead bolt, of an upper set of tumblers and a lower set of tumblers, a casing containing said parts, said casing having a double-ended keyhole, a set of keys including a guest, maids, housekeepers, guard and emergency keys, means whereby certain of said keys can be inserted in said key-hole only in normal position to operate directly upon the upper set of tumblers, one of said sets of tumblers including an emergency tumbler with means capable of dogging the bolt when projected, certain of said keys being so bitted as to operate said emergency tumbler to prevent retraction of the bolt by other of said keys.

2. In a lock, thecombination with a dead bolt and two sets of tumblers therefor, a casing for said parts, said casing having a double-ended keyhole, a series of keys including a guest, maids and housekeepers guard and emergency keys, means whereby said guest, guard and emergency keys may be inserted in said keyhole only in normal position to operate directly upon one of said sets of tumblers, connecting means for said sets of tumblers, one of said sets including an emergency tumbler with means adapted when said bolt is projected by the guard and emergency keys to prevent retraction of the bolt by the other keys of the series and adapted to be operated by the guest, maid s and l1ousekeepe1"s' keys so that the bolt may be retracted by any of the keys of the series.

3. In a lock, the combination with a deadbolt, of two sets of tumblers therefor, a casing containing said parts, said casing having a double-ended keyhole therein, a series of keys including a guest, maids, housekeepers, guard and emergency key, means whereby certain of said keys can be inserted in said keyhole only in normal position to act directly upon one set of tumblers, and connecting means for said sets of tumblers, one of said sets including an emergency tumbler with means to prevent the retraction of said bolt by certain of said keys, certain keys being so bitted that when the dead bolt is projected thereby it can only be retracted by the same keys, the other keys being so bitted that when the dead-bolt is projected thereby it can be retracted by any of the keys of the series.

4. In a lock, the combination with a dead bolt, of two sets of tumblers therefor, a casing containing said parts, said casing having a double-ended key-hole, a key post opposite one end of said key-hole, a plurality of keys including drill pin keys and solid pin keys adapted to said double-ended key-hole, said key-hole and key post being adapted to receive said drill pin keys in normal position to act directly upon one of said sets of tumblers and adapted to receive said solid pin keys in inverted position to act directly upon the other set of tumblers, and connecting means for said sets of tumblers, one of said sets including an emergency tumbler with means to hold the bolt projected, said guard and emergency keys being so bitted that when the dead bolt is projected thereby it can only be retracted by the same key, said solid pin keys being bitted to actuate the emergency tumbler when projecting the dead bolt so that said bolt may be retracted by any of said keys.

5. In a lock, the combination with a dead bolt of two sets of tumblers therefor, connecting means for said tumblers, a casing containing said parts, one side plate of said casing having a double-ended key-hole, a

drill pin opposite one end of said key-hole, the other side plate of said casing having a key-hole opposite the first mentioned keyhole and having a second key-hole, a drill pin opposite said second key-hole, and a plurality of keys including drill pin keys and solid pin keys, said double-ended keyhole being adapted to receive said drill pin keys in one position to operate directly upon one set of tumblers, said second key-hole in the inner plate being adapted to receive said drill pin keys to operate directly upon the other set of tumblers, said double-ended key-hole and the key-hole opposite thereto being adapted to receive the solid pin keys in reversed position to operate upon one set of tumblers, one of said sets of tumblers in cluding an emergency tumbler with means to hold the bolt projected, certain of said drill pin keys being sobitted that when the dead bolt is projected thereby either from the outside or the inside, the emergency tumbler will be positioned to block the operation of the other keys of the series, the other keys of the series being so bitted that when the dead bolt is projected thereby from either side the emergency tumbler will be positioned to permit retraction of the dead bolt by any of the keys of the series.

6. In a lock, the combination of a bolt, an upper and lower set of tumblers therein, connecting means for said sets of tumblers, a casing for said parts, the one side of said casing having a double-ended key-hole arranged to permit insertion of keys between said sets of tumblers, one of said sets including an emergency tumbler with means to hold the bolt projected, a key post opposite one end of said double-ended keyhole, two key-holes in said lock casing on the side opposite said double-ended key-hole, one of said two key-holes being opposite said double-ended key-hole, a key post opposite the other of said two key-holes, a series of keys including drill pin keys and solid pin keys, said double-ended key-hole being adapted to receive said drill pin keys in normal position and adapted to receive said solid pin keys in inverted position, the first mentioned key-hole on the opposite side of the lock being adapted to receive the solid pin keys in inverted position, and the second keyhole being adapted to receive the drill pin keys in normal position, one of said sets of tumblers including an emergency tumbler, said drill pin keys being adapted to operate directly upon said set of tumblers from the outer side of the lock and directly on the other set from the inner side of the lock, said solid pin keys being adapted to operate only on the second set of tumblers, certain of said drill pin keys being bitted to so position the emergency tumbler when the dead bolt is projected by said keys from the inner or outer side as to prevent retraction of the bolt by any other keys of the series, certain of said drill pin keys and all of said solid pin keys being so bitted that when the dead bolt is projected by said keys from the inner or outer side it may be retracted by any of the keys of the series from either side of the lock.

7. In a lock, the combination with a dead bolt of an upper and lower set of tumblers therefor, connecting means for said tumblers, a casing containing said parts, said upper set of tumblers including an emergency tumbler with means to hold the bolt projected, a series of keys including a maids, housekeepefis, guest, guard and emergency key, said guest, guard and emergency keys each being oi the drill pin type, said inaids and housekeepers keys being each of the solid pin type, one side plate of said casing having a double-ended key-hole adapted to receive said keys between said sets of tumblers, the other side plate having a keyhole opposite the first and having a second keyhole below the second set of tumblers, said double-ended key-hole being adapted to receive the drill pin keys in normal position to act directly upon the upper set of tumblers, and a second key-hole on the opposite side being adapted to receive the drill pin keys in normal position to act directly upon the second set of tumblers, the double-ended key-hole and the key-hole opposite thereto being adapted to receive the solid pin keys in inverted position to act directly upon the second set of tumblers, said guard and emer gency keys being so bitted as to position the emergency tumblers in projecting the dead bolt from either side of the lock to prevent retraction of said bolt by any of the other keys in the series, said guest, maids and housekeepers key respectively being so bitted as to position the emergency tumbler in projecting the dead bolt from either side of the look as to permit retraction of the dead bolt from either side of the look by any of the keys.

HENRY G. VOIGHT. NORMAN B. HURD.

Witnesses:

GWENDOLINE A. JACKSON, M. S. WVIARD.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

